Street racing and car mods in the 80s

[lancealittle]

I'm writing a story set in the 1980s, in the US, and one of the characters is very involved in street racing and has a heavily modded car he uses for this. I've been struggling to find sources about specifically street racing, not legal/sanctioned racing, and sources about car mods that would have been common specifically in the 80s.

What are some modifications that might be made to a car specifically to make it perform better in a street race? If it matters, the car is a third generation Chevy Camaro, and the character doesn't have a HUGE budget for super expensive stuff.

Is there anything I should know about the "culture" of street racing, like if there are any specific safety precautions that are common, or if there are any measures taken to prevent police from finding out about the races?

Thanks :)